Basically, I don't like this idea.
You suggest to remove models in order to make a room for somebody else, but you don't even mention skins those to come.
Who are they, characters those deserve to replace Leia and Padme? Are they important persons in the Star Wars universe? Are there models those good enough to be included in MBII, and is it possible to add them due the copyrights issues?
Without answering those questions, it's "removing just because we can" thing, which isn't really good.
You know, Leia and Padme are iconic characters, they came from the movies, and this mod is called "Movie Battles", not something else. That's gotta mean something.
If they are already in game, that because they have high-quality skins.
Also, don't ignore the fact they are girls. Serious business!
If Leia and Padme are to be replaced, then it should be some iconic characters too, not just some random aliens that only two and a half fan knows about.
And females are preferred.
I find pretty weird how this thought is formed: "hi guys, let's remove these models to include some (any) others".
Much better would something like this: "hi guys, I've got these cool models <link>, they are bug-free and kind of public domain, it would be really great if they became part of the official mb2 set because <arguments>. Since we hit models count limit, I believe these skins could be removed, we already have a lot of models for a same person... "